2 * linux/arch/arm/mach-integrator/core.c
4 * Copyright (C) 2000-2003 Deep Blue Solutions Ltd
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2, as
8 * published by the Free Software Foundation.
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/spinlock.h>
15 #include <linux/interrupt.h>
16 #include <linux/irq.h>
17 #include <linux/memblock.h>
18 #include <linux/sched.h>
19 #include <linux/smp.h>
20 #include <linux/termios.h>
21 #include <linux/amba/bus.h>
22 #include <linux/amba/serial.h>
24 #include <linux/clkdev.h>
26 #include <mach/hardware.h>
27 #include <mach/platform.h>
30 #include <asm/system.h>
32 #include <asm/mach-types.h>
33 #include <asm/mach/time.h>
34 #include <asm/pgtable.h>
36 static struct amba_pl010_data integrator_uart_data;
38 static struct amba_device rtc_device = {
43 .start = INTEGRATOR_RTC_BASE,
44 .end = INTEGRATOR_RTC_BASE + SZ_4K - 1,
45 .flags = IORESOURCE_MEM,
47 .irq = { IRQ_RTCINT, NO_IRQ },
50 static struct amba_device uart0_device = {
53 .platform_data = &integrator_uart_data,
56 .start = INTEGRATOR_UART0_BASE,
57 .end = INTEGRATOR_UART0_BASE + SZ_4K - 1,
58 .flags = IORESOURCE_MEM,
60 .irq = { IRQ_UARTINT0, NO_IRQ },
63 static struct amba_device uart1_device = {
66 .platform_data = &integrator_uart_data,
69 .start = INTEGRATOR_UART1_BASE,
70 .end = INTEGRATOR_UART1_BASE + SZ_4K - 1,
71 .flags = IORESOURCE_MEM,
73 .irq = { IRQ_UARTINT1, NO_IRQ },
76 static struct amba_device kmi0_device = {
82 .end = KMI0_BASE + SZ_4K - 1,
83 .flags = IORESOURCE_MEM,
85 .irq = { IRQ_KMIINT0, NO_IRQ },
88 static struct amba_device kmi1_device = {
94 .end = KMI1_BASE + SZ_4K - 1,
95 .flags = IORESOURCE_MEM,
97 .irq = { IRQ_KMIINT1, NO_IRQ },
100 static struct amba_device *amba_devs[] __initdata = {
109 * These are fixed clocks.
111 static struct clk clk24mhz = {
115 static struct clk uartclk = {
119 static struct clk dummy_apb_pclk;
121 static struct clk_lookup lookups[] = {
123 .con_id = "apb_pclk",
124 .clk = &dummy_apb_pclk,
126 /* Integrator/AP timer frequency */
127 .dev_id = "ap_timer",
141 }, { /* MMCI - IntegratorCP */
147 void __init integrator_init_early(void)
149 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
152 static int __init integrator_init(void)
157 * The Integrator/AP lacks necessary AMBA PrimeCell IDs, so we need to
158 * hard-code them. The Integator/CP and forward have proper cell IDs.
159 * Else we leave them undefined to the bus driver can autoprobe them.
161 if (machine_is_integrator()) {
162 rtc_device.periphid = 0x00041030;
163 uart0_device.periphid = 0x00041010;
164 uart1_device.periphid = 0x00041010;
165 kmi0_device.periphid = 0x00041050;
166 kmi1_device.periphid = 0x00041050;
169 for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
170 struct amba_device *d = amba_devs[i];
171 amba_device_register(d, &iomem_resource);
177 arch_initcall(integrator_init);
180 * On the Integrator platform, the port RTS and DTR are provided by
181 * bits in the following SC_CTRLS register bits:
186 #define SC_CTRLC IO_ADDRESS(INTEGRATOR_SC_CTRLC)
187 #define SC_CTRLS IO_ADDRESS(INTEGRATOR_SC_CTRLS)
189 static void integrator_uart_set_mctrl(struct amba_device *dev, void __iomem *base, unsigned int mctrl)
191 unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
193 if (dev == &uart0_device) {
201 if (mctrl & TIOCM_RTS)
206 if (mctrl & TIOCM_DTR)
211 __raw_writel(ctrls, SC_CTRLS);
212 __raw_writel(ctrlc, SC_CTRLC);
215 static struct amba_pl010_data integrator_uart_data = {
216 .set_mctrl = integrator_uart_set_mctrl,
219 #define CM_CTRL IO_ADDRESS(INTEGRATOR_HDR_CTRL)
221 static DEFINE_RAW_SPINLOCK(cm_lock);
224 * cm_control - update the CM_CTRL register.
225 * @mask: bits to change
228 void cm_control(u32 mask, u32 set)
233 raw_spin_lock_irqsave(&cm_lock, flags);
234 val = readl(CM_CTRL) & ~mask;
235 writel(val | set, CM_CTRL);
236 raw_spin_unlock_irqrestore(&cm_lock, flags);
239 EXPORT_SYMBOL(cm_control);
242 * We need to stop things allocating the low memory; ideally we need a
243 * better implementation of GFP_DMA which does not assume that DMA-able
244 * memory starts at zero.
246 void __init integrator_reserve(void)
248 memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET);
252 * To reset, we hit the on-board reset register in the system FPGA
254 void integrator_restart(char mode, const char *cmd)
256 cm_control(CM_CTRL_RESET, CM_CTRL_RESET);